I like bitstreaming functionality of this player, almost all formats work flawlessly - Dolby TrueHD, DTS-HD Master Audio, even the Dolby Digital+. But it doesn't work (at least for me) with DTS-HD High Resolution audio. This format is probably not widely used and I can live without it but here's an audio sample if someone wants to check it:
Bitstreaming works for me in MPC-HC and properly configured ffdshow with this sample.